<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="82px">
      <el-form-item label="轮播图类型" prop="bannerType">
        <el-select v-model="queryParams.bannerType" placeholder="请选择轮播图类型" clearable>
          <el-option v-for="item in  bannerTypeList" :label="item.label" :value="item.value"/>
        </el-select>
      </el-form-item>
      <el-form-item label="优先级" prop="isPreferred">
        <el-select v-model="queryParams.isPreferred" placeholder="请选择优先级" clearable>
          <el-option v-for="item in  isPreferredList" :label="item.label" :value="item.value"/>
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['system:banner:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['system:banner:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['system:banner:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['system:banner:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="bannerList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="序号" align="center">
        <template slot-scope="{ $index }">
          <span>{{ $index + 1 }}</span>
        </template>
      </el-table-column>
      <el-table-column label="图片地址" align="center" prop="imageAddress">
        <template slot-scope="scope">
          <el-image :src="scope.row.imageAddress" style="width: 100px; height: 100px" />
        </template>
      </el-table-column>
      <el-table-column label="跳转地址" align="center" prop="jumpAddress">
        <template slot-scope="scope">{{scope.row.jumpAddress ? scope.row.jumpAddress : '无'}}</template>
      </el-table-column>
      <el-table-column label="轮播图类型" align="center" prop="bannerType">
        <template slot-scope="scope">
          {{ getBannerType(scope.row.bannerType) }}
        </template>
      </el-table-column>
      <el-table-column label="优先级" align="center" prop="isPreferred">
        <template slot-scope="scope">
          {{ getPre(scope.row.isPreferred) }}
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['system:banner:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['system:banner:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改banner图对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="600px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="100px">
        <el-form-item label="图片地址" prop="imageAddress">
          <image-upload v-model="form.imageAddress" dir-name="banner" :limit="1"/>
        </el-form-item>
        <el-form-item label="跳转地址" prop="jumpAddress">
          <el-input v-model="form.jumpAddress" type="textarea" placeholder="请输入跳转地址" />
        </el-form-item>
        <el-form-item label="轮播图类型" prop="bannerType">
          <el-select v-model="form.bannerType" placeholder="请选择轮播图类型" clearable>
            <el-option v-for="item in  bannerTypeList" :label="item.label" :value="item.value"/>
          </el-select>
        </el-form-item>
        <el-form-item label="优先级" prop="isPreferred">
          <el-select v-model="form.isPreferred" placeholder="请选择优先级" clearable>
            <el-option v-for="item in  isPreferredList" :label="item.label" :value="item.value"/>
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listBanner, getBanner, delBanner, addBanner, updateBanner } from "@/api/system/banner";

export default {
  name: "Banner",
  data() {
    return {
      // 轮播图类型
      bannerTypeList: [
        {
          label: "首页",
          value: "0"
        },
        {
          label: "知识",
          value: "1"
        }
      ],
      //优先级
      isPreferredList: [
        {
          label: "默认",
          value: "0"
        },
        {
          label: "优先",
          value: "1"
        },
        {
          label: "必选",
          value: "2"
        }
      ],
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // banner图表格数据
      bannerList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        imageAddress: null,
        jumpAddress: null,
        bannerType: null,
        isPreferred: null,
        flag: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        imageAddress: [
          { required: true, message: "图片地址不能为空", trigger: "blur" }
        ],
        jumpAddress: [
          { required: true, message: "跳转地址不能为空", trigger: "blur" }
        ],
        bannerType: [
          { required: true, message: "banner表的类型不能为空", trigger: "change" }
        ],
        isPreferred: [
          { required: true, message: "是否首选不能为空", trigger: "blur" }
        ],
        createTime: [
          { required: true, message: "创建时间不能为空", trigger: "blur" }
        ],
        flag: [
          { required: true, message: "有效字段不能为空", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    /** 转换banner类型数据字典 */
    getBannerType(type) {
      type = type.toString();
      const bannerType = this.bannerTypeList.find(typeValue => typeValue.value === type);
      return bannerType.label;
    },
    /** 转换优先级数据字典 */
    getPre(type) {
      type = type.toString();
      const isPreferred = this.isPreferredList.find(typeValue => typeValue.value === type);
      return isPreferred.label;
    },
    /** 查询banner图列表 */
    getList() {
      this.loading = true;
      listBanner(this.queryParams).then(response => {
        this.bannerList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        bannerId: null,
        imageAddress: null,
        jumpAddress: null,
        bannerType: null,
        isPreferred: null,
        createTime: null,
        updateTime: null,
        flag: null
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.bannerId)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加banner图";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const bannerId = row.bannerId || this.ids
      getBanner(bannerId).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改banner图";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.bannerId != null) {
            updateBanner(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addBanner(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const bannerIds = row.bannerId || this.ids;
      this.$modal.confirm('是否确认删除banner图编号为"' + bannerIds + '"的数据项？').then(function() {
        return delBanner(bannerIds);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('system/banner/export', {
        ...this.queryParams
      }, `banner_${new Date().getTime()}.xlsx`)
    }
  }
}
</script>
